The Lex Burgundionum (Latin for Burgundian Laws, also Lex Gundobada) refers to the law code of the Burgundians, probably issued by king Gundobad. It is influenced by Roman law and deals with domestic laws concerning marriage and inheritance as well as regulating weregild and other penalties. Interaction between Burgundians is treated separately from interaction between Burgundians and Gallo-Romans. The oldest of the 14 surviving manuscripts of the text dates to the 9th century, but the code's institution is ascribed to king Gundobad (died 516), with a possible revision by his successor Sigismund (died 523). The Lex Romana Burgundionum is a separate code, containing various laws taken from Roman sources, probably intended to apply to the Burgundians' Gallo-Roman subjects. The oldest copy of this text dates to the 7th century.

The Lex Burgundionum code was compiled by King Gundobad (474-516), very probably after his defeat by Clovis I in 500. Some additamenta were subsequently introduced, either by Gundobad himself or by his son Sigismund. This law bears the title of Liber Constitutionum, indicating that it emanated from the king; it is also known as the Lex Gundobada or Lex Gombata. It was used for cases between Burgundians, and was also applicable to cases between Burgundians and Romans. For cases between Romans, however, Gundobad compiled the Lex Romana Burgundionum, called sometimes, through a misreading of the manuscript, the Liber Papiani, or simply Papianus.

Gundobad (Latin: Flavius Gundobadus; French: Gondebaud, Gondovald; c. 452 – 516 AD) was King of the Burgundians (473 – 516), succeeding his father Gundioc of Burgundy. Previous to this, he had been a Patrician of the moribund Western Roman Empire in 472 – 473, three years before its collapse, succeeding his uncle Ricimer. He is perhaps best known today as the probable issuer of the Lex Burgundionum legal codes, which synthesized Roman law with ancient Germanic customs. He was the husband of Caretene.